Robust edge modes in dislocated systems of subwavelength resonators
Robust edge modes in dislocated systems of subwavelength resonators
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DOI：
10.1112/jlms.12619
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发表时间：
2022-04-22
影响因子：
1.2
通讯作者：
Hiltunen, Erik Orvehed
中科院分区：
文献类型：
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作者：
Ammari, Habib;Davies, Bryn;Hiltunen, Erik Orvehed
在亚波长尺度上稳健地操纵波可以通过以下两种方法实现：第一，设计具有亚波长带隙的结构；第二，引入缺陷，使本征频率落在带隙内。众所周知，这样的频率对应于局域模式。我们研究了一维亚波长谐振腔阵列，证明了存在亚波长带隙，并证明了通过引入位错，我们可以在带隙内的任何点上放置局域模。我们通过研究相应的有限谐振器阵列的稳定性来补充这一分析，证明了能够定制本征值在带隙内的位置的价值。
Robustly manipulating waves on subwavelength scales can be achieved by, first, designing a structure with a subwavelength band gap and, second, introducing a defect so that eigenfrequencies fall within the band gap. Such frequencies are well known to correspond to localized modes. We study a one-dimensional array of subwavelength resonators, prove that there is a subwavelength band gap, and show that by introducing a dislocation we can place localized modes at any point within the band gap. We complement this analysis by studying the stability properties of the corresponding finite array of resonators, demonstrating the value of being able to customize the position of eigenvalues within the band gap.